EP2072828B1 - Wet-running centrifugal pump - Google Patents
Wet-running centrifugal pump Download PDFInfo
- Publication number
- EP2072828B1 EP2072828B1 EP07024385.2A EP07024385A EP2072828B1 EP 2072828 B1 EP2072828 B1 EP 2072828B1 EP 07024385 A EP07024385 A EP 07024385A EP 2072828 B1 EP2072828 B1 EP 2072828B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- housing
- wet
- stator
- motor
- pump
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000004804 winding Methods 0.000 claims description 6
- 238000010276 construction Methods 0.000 claims description 3
- 230000004888 barrier function Effects 0.000 claims description 2
- 239000012530 fluid Substances 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 claims 1
- 238000001816 cooling Methods 0.000 description 10
- 238000013461 design Methods 0.000 description 10
- 239000007788 liquid Substances 0.000 description 6
- 150000001875 compounds Chemical class 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000004382 potting Methods 0.000 description 3
- 239000003570 air Substances 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 210000002105 tongue Anatomy 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012549 training Methods 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D13/0606—Canned motor pumps
- F04D13/064—Details of the magnetic circuit
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D13/0606—Canned motor pumps
- F04D13/0626—Details of the can
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D13/0686—Mechanical details of the pump control unit
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/5813—Cooling the control unit
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/30—Structural association with control circuits or drive circuits
- H02K11/33—Drive circuits, e.g. power electronics
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/12—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas
- H02K5/128—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas using air-gap sleeves or air-gap discs
- H02K5/1282—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas using air-gap sleeves or air-gap discs the partition wall in the air-gap being non cylindrical
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
- H02K5/225—Terminal boxes or connection arrangements
Definitions
- the invention relates to a wet-running centrifugal pump with the features specified in the preamble of claim 1.
- Wet-running centrifugal pumps of this type are known, for example, in the form of heating circulation pumps. They have a liquid-carrying pump housing. The pump is driven by a canned motor with a stator, in which a gap tube is arranged, which is filled with liquid, and in which runs a magnetically co-operating with the stator rotor, which drives a shaft on which the impeller of the pump sits. Furthermore, an engine electronics is provided which is designed in the simplest form as a motor protection switch or in the form of electronic switches for connecting or disconnecting winding parts of the stator or as a frequency converter for controlling the speed of the pump including the then typically associated control. Such wet-running centrifugal pumps are known in particular as heating circulation pumps, circulation pumps and the like in different designs.
- a constant problem is that leaks can occur when seals are aging, so that moisture can also penetrate into the area of the electronics, which can damage or destroy the engine electronics.
- the invention has the object, a generic wet-run centrifugal pump in such a way that these problems are reduced, with a simple and cost-effective design should be realized.
- the wet-running centrifugal pump according to the invention is provided with a fluid-conducting pump housing, a canned motor driving the pump with a stator and with a rotor running in the fluid-carrying canned tube with a shaft on which the impeller of the pump is seated.
- the engine electronics or at least a part of the engine electronics between the stator and the pump housing surrounding the can is arranged.
- the basic idea is thus not to arrange the motor electronics, as is usual in the prior art, on the outside of the motor housing, but rather to arrange them in the region between the stator and the pump housing, specifically in the area surrounding the can. In this way, a particularly compact design can be achieved because with a suitable design, the engine electronics can be within the contour of the pump housing, resulting in further, further detailed below described constructive advantages.
- This arrangement also has the advantage that the heat generated in the engine electronics, depending on the pump type can be done either via the pump housing or by convection to the outside or by a combination thereof.
- the motor electronics in particular the motherboard receiving housing has a directed to the pump housing wall, which is spaced from the pump housing and having at least one opening.
- the space formed between this wall and the pump housing is provided with at least one opening to the outside environment.
- the housing accommodating the motor electronics is connected to the outside environment via the opening in the wall and the further opening between this wall and the pump housing so that condensation can be dissipated via this opening.
- there is some air exchange between the interior of the engine electronics housing and the outside environment ensures what is beneficial. Characterized in that a wall spaced from the pump housing is provided, the housing receiving the motherboard is formed closed on the bottom side.
- a heat insulation or a heat pipe may optionally be provided in the space formed between this wall and the pump housing, a heat insulation or a heat pipe to allow cooling through the pump housing or, for example, when hot liquid is conveyed, to isolate.
- a thermal barrier can be effected by suitable thermal insulators.
- the motor electronics are designed and arranged in the region surrounding the can, in such a way that it has a radial extent projecting beyond the stator, which preferably lies within the outer contour of the pump housing. It can thus be used in the radial direction anyway for the pump housing required space for the arrangement of the engine electronics.
- the fact that the motor electronics extends radially so far that it projects radially beyond the stator there are further design advantages, since in this, the stator radially projecting area electrical / electronic components such as switches, displays, cable management and the like can be arranged, the on the one hand statornah and thus arranged compact and accessible from the outside, on the other hand, however, have a particularly easy access to the engine electronics.
- a main board which is arranged transversely to the impeller axis surrounding the gap tube between the stator and the pump, via which the stator windings are connected and which has a connection for connection to the supply network.
- the stator can be connected by a simple connector on this motherboard, as well as in the stator superior area be provided a corresponding connector for the power supply. This results in both a particularly compact design and a particularly simple construction, since in the ideal case the entire motor electronics and the connection wiring of the motor are brought together on this motherboard.
- the motherboard and stator are mechanically connected to each other, preferably to a structural unit.
- the mechanical attachment of the stator is thus also via the motherboard, via which at the same time takes place the electrical Konnekttechnik.
- stator and motherboard can be arranged in a common housing. It is particularly advantageous, however, if the motherboard are arranged in a housing and the stator in a separate housing and these two housings are electrically and mechanically interconnected. Then stator and motor electronics can be handled independently of each other, so that in accordance with modular design, a stator with different engine electronics variants can be used without having to change this structurally. Since the motherboard is preferably transverse to the longitudinal axis of the can, which passes through them and which also passes through the stator, all electrical connections between the stator and the engine electronics can be configured by simple plug-in connections, wherein the radial guidance of the housing is given by the already existing split tube.
- the housing accommodating the motherboard and the housing accommodating the stator are each designed as units which can be mounted independently of the can.
- Such an arrangement has the particular advantage that the electrical / electronic components of the engine regardless of the liquid-carrying components of the Pump not only arranged but also interchangeable.
- the stator and the engine electronics can be removed from the can and thus from the pump housing without having to remove the liquid outlet or the pump from its installation position.
- this directed to the pump housing wall of the motherboard receiving housing thermally conductively connected to heat-generating components of the engine electronics or interspersed by an associated heat spreader, preferably lateral housing openings are provided in this area, which for generating a Konve irritationsströmung serve along this wall or the heat spreader.
- the high-building electrical and electronic components in the region of the motherboard, which projects radially beyond the winding head of the stator, so that these components can be arranged in the space surrounding the winding head, which is typically within the outer contour of the pump housing is located.
- the heat-generating components of the engine electronics are arranged on the pump side facing the motherboard and preferably thermally conductively connected to an axial cover of the pump housing.
- an axial cover of the pump housing which forms a wall of the pump housing, may for example be formed by a flange provided on the gap tube, which is typically formed of highly conductive metal sheet.
- the heat-generating components of the engine electronics may be arranged on the side facing away from the pump of the main board and then preferably thermally conductive to connect to the surface of the motor housing. Then the heat dissipation takes place via the surface of the stator or motor housing.
- the main board advantageously projects radially beyond the stator, electrical connections for an electronic display, for an additional module, for a switch and / or for the mains connection can be provided in this area on the side of the board facing away from the pump be on the one hand meaningfully use the space formed there on the other hand To be able to connect these components comparatively easily electrically.
- the pump housing is designed on its side facing the motor substantially with a rectangular, preferably a square outer contour and the motor housing congruent thereto. It is understood that here is no rectangle or square in the geometric sense to understand that housing corners are rounded and only about such an outer contour is obtained.
- the motor housing can accommodate both stator and engine electronics and then form a independently mountable unit of the can.
- the motor housing may be formed completely or partially potted or formed by the potting compound itself. It is then not a housing in the true sense, but to the stator and possibly also the engine electronics surrounding potting compound, which forms the housing.
- the main circuit board is arranged transversely to the longitudinal axis of the can, this advantageously has a grounding contact on its side facing the pump, preferably a grounding pin, which is conductively connected to the pump housing and / or the cover of the pump housing.
- a grounding pin can conductively engage in a corresponding recess in the pump housing, so that automatically takes place during assembly with the joining of these components, the required grounding.
- the grounding pin can form an anti-rotation lock of the motor housing, possibly several pins can be provided.
- the motor housing is fastened advantageously not on the pump housing, but by means of fastening means acting on the gap tube, which fix the motor housing via the gap tube on the pump housing at least in the axial direction of the motor. It is therefore advantageous the split tube attached to the pump housing and then the motor housing on the can.
- a circumferential groove may be provided on the motor-side end of the can, in which engages at least one locking lug an end plate, wherein the motor housing is then fixed by means of this plate on the gap tube on the pump housing.
- an anti-rotation in order to achieve not only a determination in the axial direction, but also in the radial direction, ie an anti-rotation, according to the invention between the pump housing and the motor housing such is provided. Due to the given there naturally greater distance to the axis of rotation of the motor anti-rotation can be formed with relatively simple components, which have sufficient torque stability. In this respect, it is particularly favorable to achieve only the axial fixing of the motor housing via the split tube and the anti-rotation device via separate Fom gleichstoff between the motor and pump housing.
- the pump unit 1 illustrated with reference to the figures has a pump housing 2, which is designed as an inline housing and has an input connection 3 and an output connection 4 arranged at the same axis. From the input port 3, a channel extends to the suction port of a centrifugal 5 of the pump, which promotes via a trained within the pump housing 2 screw to the output port 4.
- the pump is driven by an electric motor, which is formed by a stator 6 and a rotor 7. Stator 6 and rotor 7 are separated by a split tube 8.
- the rotor 7 is part of a shaft 9, on the pump-side end of the impeller 5 is rotatably mounted.
- the split tube 8 is designed as a canned pot closed at the end and has thereon a removable closure stopper 10, via which the can 8 can be vented and the shaft 9 is accessible.
- the can 8 has the pump side, a flange-like projection 11, with which it is attached directly to the pump housing 2.
- stator 6 is arranged in a stator housing 12, which adjoins an electronics housing 13, which is arranged between the stator housing 12 and the pump housing 2.
- Stator housing 12 and electronics housing 13 form the motor housing 14, the one-piece, as in Fig. 15 represented or multipart, as based on Fig. 5 can be shown formed.
- the pump housing 2 has seen in the axial direction of the rotor 7 has a substantially square shape with rounded corners.
- the adjoining thereto in the axial direction of the rotor stator housing 12 is continuously converted only in the area of the corners in the outer contour of the electronics housing 13, but otherwise has a much smaller cross-section, so that a gradation 15 to the electronics housing 13 results.
- the electronics housing 13 thus projects radially beyond the stator housing 12 in this area.
- this gradation 15 In the area of this gradation 15 is an electronic display 16 near the top of the motor housing 14 relative to the normal mounting position according to Fig. 1 intended.
- a rotary switch 17 is arranged in the region of the graduation 15, with which, for example, the rotational speed of the pump can be set from the outside.
- a plug 18 is arranged there, which is connected to a power cable 19.
- the components 16, 17, 18, which are only examples of any suitable components to be arranged here, are arranged directly adjacent to the motor housing 14, in the free space formed by the step 15.
- the components 16, 17, and 18 are connected via corresponding electrical connectors directly to a arranged within the electronics housing 13 mother board 20, which, the gap tube 8 surrounding, is arranged perpendicular to the rotor axis 21. Since these components 16, 17, 18 lie in the axial direction 21 seen laterally from the stator 6, these can be contacted in addition to the stator 6 on the motherboard 20, which carries the entire engine electronics and the power connector.
- Fig. 2 As in Fig. 2 is clearly visible, while the electronic components, which have a height, which projects beyond the distance between the motherboard 20 and stator 6, in the lateral region, that is arranged in the region of the motherboard 20, with which it projects beyond the stator 6 radially. Such a component is in Fig. 2 marked with 22.
- stator housing 12 and electronics housing 13 are positively fixed to the pump housing 2, not directly, but over the gap tube 8.
- This end plate thus defines the motor housing 14 in the direction of the axis 21 on the can 8 and thus fixed to the pump housing 2.
- an anti-rotation 8 pins 26 are provided on the flange-like projection 11 of the split tube, which engage in corresponding recesses of the electronics housing 13 or vice versa.
- stator housing 12 and electronics housing 13 are made in two parts, then such pin 26 may be provided between these two housing parts as rotation, as in Fig. 5 is shown by way of example.
- the entire motor in the form of the motor housing 14 are removed after removing the end plate 24 from the pump housing 2 and are mounted in the reverse manner, without liquid-carrying parts of the pump are to be solved.
- stator 6 projects beyond the actual main body of the stator housing 12 to the pump.
- the electronics housing 13 has in alignment with a corresponding central recess into which engages this annular part 27 of the stator housing 12.
- Rotary switch 17 and power plug 18 are releasably secured on the electronics housing 13 via corresponding locking tongues 29.
- the connector 28 consists of a stator side, projecting in the direction of the pump connector part and a corresponding connection part on the motherboard 20.
- the connector part may be formed for example by pins, which are gripped by the plug part like a sleeve.
- the components 16, 17 and 18 are electrically connected directly to the motherboard 20.
- the electronics housing 13 has, on the side facing the pump, a wall 31, which is arranged in the installed position at a distance from the flange-like projection 11, which forms a wall of the pump housing.
- the clearance formed therebetween is opened via recesses 32 in the outside of the electronics housing 13, on the outside of the housing to the outside environment.
- 31 recesses 33 are provided in the wall, which form an access to the otherwise closed electronics housing 13. Via the recesses 33, 32, a gas exchange between the external environment and the interior of the electronics housing 13 take place, in addition, this can cause condensation from the electronics housing and escape the space formed between the electronics housing and the pump housing 2 on the other side of the wall 31 to the outside.
- the wall 31 is penetrated by a grounding pin 34 which is arranged in an electrically conductive manner on the side of the motherboard 2 facing the pump and forms an electrical ground connection to the pump housing 2 after the electronics housing 13 has been mounted on the pump housing 2.
- a corresponding recess is provided in the side facing the electronics housing 13 end face of the pump housing 2, in which the grounding pin 34 conductively engages.
- the pump housing 2 is made of electrically conductive material.
- the grounding pin can also form an anti-rotation device for the electronics housing 13 relative to the pump housing 2. In addition, however, such a rotation lock is provided by four pins 26 which engage in the recesses 33.
- recesses 33 should also be provided for loading / degassing or for removing the condensed water, the number of recesses 33 must be greater than the number of pins 26 engaging therein.
- recesses 35 serve, which are provided for receiving the screw heads, with which the flange-like part 11 of the split tube 8 is bolted to the pump housing 2. These recesses 35 may be closed as blind holes or open, depending on whether a connection with the interior of the electronics housing 13 should be made or not.
- the space formed between electronics housing 13 and pump housing 2 can be flowed through by the recesses 32 of the ambient air and thus be used for cooling purposes.
- This is in the basis of the FIGS. 8 and 9 illustrated embodiment on the pump side facing the motherboard 20 (not shown) provided heat spreader, on which a rib heat sink 36 sits, which penetrates the wall 31 and projects into this room.
- a natural convection flow results in the space via the recesses 32, which cools the fin cooling body 36 and thus the heat-generating electronics in the electronics housing 13.
- further or additional cooling can take place via the pump housing, in particular via the flange-like projection 11, when it is to be expected that the medium to be pumped forms a heat sink.
- the pump however, provided for the promotion of hot or warm liquid, then it is expedient to provide the electronics housing 13 facing wall of the pump housing with a heat insulating layer and thus to thermally insulate the motor housing 14 and the pump housing 2 from each other.
- the recesses 32 are formed comparatively large, to form a sufficient cross section for generating a cooling air flow.
- the cooling of the engine electronics via the motor housing ie on the outside of the motor housing.
- the recesses 32 are relatively small.
- the cooling of the arranged inside the electronics housing 13 heat generating electronics via the pumped liquid of the pump should be made, then it is expedient to form the heat spreader in the bottom of the electronics housing 13 so that this projects up to the wall 11 of the pump housing and at this thermally conductive rests.
- Such training is in the FIGS. 16 and 17 shown.
- the heat spreader 39 directed to the pump, in FIG. 17 visible end face bears thermally conductive on the wall 11 of the pump housing and thus transfers heat to the immediately behind flowing conveying fluid.
- the recesses 32 are of smaller cross-section, since these are intended only for the removal of any condensate, but not for generating a convection along the wall 31 and provided.
- stator housing 12 and an electronics housing 13 are provided, which are interconnected in the manner described above, so that is electrically connected by the connector 28 of the stator to the motherboard 20, which carries all other electrical connections and the entire engine electronics.
- the circuit board 20 has a central recess 37, which is penetrated by an annular inner housing part 38, so that in itself outwardly and inwardly (to the gap 8 through) closed electronics housing is formed, however, has a central opening for the can 8 ,
- the electronics housing 13 can, as shown in the FIGS.
- stator housing 12 and 13 be seen to be hermetically closed or, as described above, venting / drainage openings to the space formed between the electronics housing 13 and the pump housing 2 have.
- the stator housing 12 is hermetically sealed. It can be formed as well as the electronics housing 13 by a hollow body-like housing part or by a potting compound, it can also be a hollow body-like housing part completely or partially potted, be it with the stator 6 or arranged on the motherboard 20 engine electronics.
- the motor housing 14 is integrally formed.
- the stator 6 is mounted directly on the motherboard 20 and electrically contacted.
- the structure of the board 20 corresponds to the above.
- the rotation takes place only between the pin 26 on the flange-like projection 11 of the can 8 and the corresponding recesses 33 in the wall 31 of the motor housing 14th
- pins 26 serve not only as Verdrechsch, but also to guide between the components and to increase the stability of the overall unit.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Description
Die Erfindung betrifft eine Nasslaufkreiselpumpe mit den im Oberbegriff des Anspruchs 1 angegebenen Merkmalen.The invention relates to a wet-running centrifugal pump with the features specified in the preamble of
Nasslaufkreiselpumpen dieser Art sind beispielsweise in Form von Heizungsumwälzpumpen bekannt. Sie weisen ein flüssigkeitsführendes Pumpengehäuse auf. Angetrieben wird die Pumpe von einem Spaltrohrmotor mit einem Stator, in dem ein Spaltrohr angeordnet ist, welches flüssigkeitsgefüllt ist, und in dem ein mit dem Stator magnetisch zusammen wirkender Rotor läuft, der eine Welle antreibt, auf der das Laufrad der Pumpe sitzt. Weiterhin ist eine Motorelektronik vorgesehen, die in einfachster Form als Motorschutzschalter oder in Form von elektronischen Schaltern zum Zu- bzw. Abschalten von Wicklungsteilen des Stators oder als Frequenzumrichters zur Drehzahlsteuerung der Pumpe einschließlich der dann typischerweise zugehörigen Regelung ausgebildet ist. Derartige Nasslaufkreiselpumpen sind insbesondere als Heizungsumwälzpumpen, Zirkulationspumpen und dergleichen in unterschiedlichen Bauformen bekannt.Wet-running centrifugal pumps of this type are known, for example, in the form of heating circulation pumps. They have a liquid-carrying pump housing. The pump is driven by a canned motor with a stator, in which a gap tube is arranged, which is filled with liquid, and in which runs a magnetically co-operating with the stator rotor, which drives a shaft on which the impeller of the pump sits. Furthermore, an engine electronics is provided which is designed in the simplest form as a motor protection switch or in the form of electronic switches for connecting or disconnecting winding parts of the stator or as a frequency converter for controlling the speed of the pump including the then typically associated control. Such wet-running centrifugal pumps are known in particular as heating circulation pumps, circulation pumps and the like in different designs.
Bei einer bekannten Umwälzpumpe dieser Art ist die Motorelektronik in einem seitlich am Motorgehäuse angebrachten, dieses teilweise umgebenden Klemmenkasten angeordnet, über welchen auch der Netzanschluss des Motors herausgeführt ist. Solche seitlich am Motorgehäuse angeordneten Klemmenkästen bzw. Zusatzgehäuse für die Elektronik haben sich grundsätzlich bewährt, da die Motorelektronik damit konstruktiv einfach und zuverlässig von den flüssigkeitsführenden Bauteilen entfernt angeordnet und damit flüssigkeitsgeschützt ist. Ein gewisser Nachteil besteht jedoch darin, dass die Baugröße durch dieses zusätzliche Gehäuse nicht unerheblich wächst, was insbesondere in beengten Einbausituationen problematisch sein kann.In a known circulation pump of this type, the engine electronics in a laterally mounted on the motor housing, this partially surrounding terminal box is arranged, through which also the power supply of the motor is led out. Such laterally arranged on the motor housing terminal boxes or additional housing for the electronics have basically proven, since the engine electronics so constructively simple and reliable away from the liquid-carrying components and thus is liquid-protected. Someone specific Disadvantage, however, is that the size of this additional housing is not negligible, which can be particularly problematic in cramped installation situations.
Aus
Ein stetes Problem ist, dass bei Alterung von Dichtungen Undichtigkeiten auftreten können, sodass Feuchtigkeit auch in den Bereich der Elektronik eindringen kann, was zur Schädigung oder Zerstörung der Motorelektronik führen kann.A constant problem is that leaks can occur when seals are aging, so that moisture can also penetrate into the area of the electronics, which can damage or destroy the engine electronics.
Vor diesem Hintergrund liegt der Erfindung die Aufgabe zugrunde, eine gattungsgemäße Nasslaufkreiselpumpe so auszubilden, dass diese Probleme vermindert werden, wobei ein einfacher und kostengünstiger Aufbau realisiert werden soll.Against this background, the invention has the object, a generic wet-run centrifugal pump in such a way that these problems are reduced, with a simple and cost-effective design should be realized.
Diese Aufgabe wird gemäß der Erfindung durch die in Anspruch 1 angegebenen Merkmale gelöst. Vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen, der nachfolgenden Beschreibung und der Zeichnung angegeben.This object is achieved according to the invention by the features specified in
Die erfindungsgemäße Nasslaufkreiselpumpe ist mit einem flüssigkeitsführenden Pumpengehäuse, einem die Pumpe antreibenden Spaltrohrmotor mit einem Stator und mit einem in dem flüssigkeitsführenden Spaltrohr laufenden Rotor mit einer Welle versehen, auf welcher das Laufrad der Pumpe sitzt. Dabei ist die Motorelektronik oder zumindest ein Teil der Motorelektronik zwischen dem Stator und dem Pumpengehäuse das Spaltrohr umgebend angeordnet.The wet-running centrifugal pump according to the invention is provided with a fluid-conducting pump housing, a canned motor driving the pump with a stator and with a rotor running in the fluid-carrying canned tube with a shaft on which the impeller of the pump is seated. In this case, the engine electronics or at least a part of the engine electronics between the stator and the pump housing surrounding the can is arranged.
Grundgedanke ist es somit, die Motorelektronik nicht wie beim Stand der Technik üblich, außen am Motorgehäuse anzuordnen, sondern diese vielmehr im Bereich zwischen Stator und Pumpengehäuse, und zwar in dem Bereich, der das Spaltrohr umgibt, anzuordnen. Hierdurch kann eine besonders kompakte Bauform erreicht werden, da bei geeigneter Auslegung die Motorelektronik innerhalb der Kontur des Pumpengehäuses liegen kann, wodurch sich weitere, im Folgenden noch detailliert beschriebene weitere konstruktive Vorteile ergeben. Diese Anordnung hat zudem den Vorteil, dass die in der Motorelektronik erzeugte Wärme je nach Pumpentyp wahlweise über das Pumpengehäuse oder durch Konvektion nach außen oder durch eine Kombination davon erfolgen kann.The basic idea is thus not to arrange the motor electronics, as is usual in the prior art, on the outside of the motor housing, but rather to arrange them in the region between the stator and the pump housing, specifically in the area surrounding the can. In this way, a particularly compact design can be achieved because with a suitable design, the engine electronics can be within the contour of the pump housing, resulting in further, further detailed below described constructive advantages. This arrangement also has the advantage that the heat generated in the engine electronics, depending on the pump type can be done either via the pump housing or by convection to the outside or by a combination thereof.
Gemäß der Erfindung weist das die Motorelektronik, insbesondere die Hauptplatine aufnehmende Gehäuse eine zum Pumpengehäuse gerichtete Wand auf, die vom Pumpengehäuse beabstandet ist und die mindestens eine Öffnung aufweist. Darüber hinaus ist der zwischen dieser Wand und dem Pumpengehäuse gebildete Raum mit mindestens einer Öffnung zur Außenumgebung versehen. Auf diese Weise ist das die Motorelektronik aufnehmende Gehäuse über die Öffnung in der Wand sowie die weitere Öffnung zwischen dieser Wand und dem Pumpengehäuse mit der Außenumgebung verbunden, so dass über diese Öffnung Schwitzwasser abgeführt werden kann. Auch ist über diese Öffnungen ein gewisser Luftaustausch zwischen dem Inneren des Motorelektronikgehäuses und der Außenumgebung gewährleistet, was von Vorteil ist. Dadurch, dass eine vom Pumpengehäuse beabstandete Wand vorgesehen ist, ist das die Hauptplatine aufnehmende Gehäuse bodenseitig geschlossen ausgebildet. Es kann in dem zwischen dieser Wand und dem Pumpengehäuse gebildeten Raum wahlweise eine Wärmeisolierung oder eine Wärmeleitung vorgesehen sein, um eine Kühlung über das Pumpengehäuse zu ermöglichen oder aber, wenn beispielsweise heiße Flüssigkeit gefördert wird, demgegenüber zu isolieren. Eine solche thermische Barriere kann durch geeignete thermische Isolatoren erfolgen.According to the invention, the motor electronics, in particular the motherboard receiving housing has a directed to the pump housing wall, which is spaced from the pump housing and having at least one opening. In addition, the space formed between this wall and the pump housing is provided with at least one opening to the outside environment. In this way, the housing accommodating the motor electronics is connected to the outside environment via the opening in the wall and the further opening between this wall and the pump housing so that condensation can be dissipated via this opening. Also, through these openings, there is some air exchange between the interior of the engine electronics housing and the outside environment ensures what is beneficial. Characterized in that a wall spaced from the pump housing is provided, the housing receiving the motherboard is formed closed on the bottom side. It may optionally be provided in the space formed between this wall and the pump housing, a heat insulation or a heat pipe to allow cooling through the pump housing or, for example, when hot liquid is conveyed, to isolate. Such a thermal barrier can be effected by suitable thermal insulators.
Besonders vorteilhaft ist es, wenn die Motorelektronik in dem das Spaltrohr umgebenden Bereich derart ausgebildet und angeordnet ist, dass sie eine den Stator überragende radiale Erstreckung aufweist, die vorzugsweise innerhalb der Außenkontur des Pumpengehäuses liegt. Es kann damit der in radialer Richtung ohnehin für das Pumpengehäuse benötigte Raum zur Anordnung der Motorelektronik genutzt werden. Dadurch, dass sich die Motorelektronik radial so weit erstreckt, dass sie den Stator radial überragt, ergeben sich weitere konstruktive Vorteile, da in diesem, den Stator radial überragenden Bereich elektrische/elektronische Bauteile wie Schalter, Anzeigen, Kabelführung und dergleichen angeordnet werden können, die einerseits statornah und damit kompakt angeordnet und von außen zugänglich sind, andererseits jedoch einen besonders einfachen Zugang zu der Motorelektronik aufweisen.It is particularly advantageous if the motor electronics are designed and arranged in the region surrounding the can, in such a way that it has a radial extent projecting beyond the stator, which preferably lies within the outer contour of the pump housing. It can thus be used in the radial direction anyway for the pump housing required space for the arrangement of the engine electronics. The fact that the motor electronics extends radially so far that it projects radially beyond the stator, there are further design advantages, since in this, the stator radially projecting area electrical / electronic components such as switches, displays, cable management and the like can be arranged, the on the one hand statornah and thus arranged compact and accessible from the outside, on the other hand, however, have a particularly easy access to the engine electronics.
Vorteilhaft ist eine Hauptplatine vorgesehen, welche quer zur Laufradachse das Spaltrohr umgebend zwischen Stator und Pumpe angeordnet ist, über welche die Statorwicklungen angeschlossen sind und welche eine Verbindung zum Anschluss an das Versorgungsnetz aufweist. Der Stator kann dabei durch eine einfache Steckverbindung auf dieser Hauptplatine angeschlossen werden, ebenso kann in dem den Stator überragenden Bereich eine entsprechende Steckverbindung für die Netzversorgung vorgesehen sein. Hierdurch ergibt sich sowohl eine besonders kompakte Bauform als auch eine besonders einfach Konstruktion, da im Idealfall die gesamte Motorelektronik und die Anschlussverdrahtung des Motors auf dieser Hauptplatine zusammengeführt sind.Advantageously, a main board is provided, which is arranged transversely to the impeller axis surrounding the gap tube between the stator and the pump, via which the stator windings are connected and which has a connection for connection to the supply network. The stator can be connected by a simple connector on this motherboard, as well as in the stator superior area be provided a corresponding connector for the power supply. This results in both a particularly compact design and a particularly simple construction, since in the ideal case the entire motor electronics and the connection wiring of the motor are brought together on this motherboard.
Gemäß einer vorteilhaften Weiterbildung der Erfindung sind Hauptplatine und Stator mechanisch miteinander verbunden, vorzugsweise zu einer baulichen Einheit. Die mechanische Befestigung des Stators erfolgt also auch über die Hauptplatine, über welche zugleich die elektrische Konnektierung erfolgt.According to an advantageous embodiment of the invention, the motherboard and stator are mechanically connected to each other, preferably to a structural unit. The mechanical attachment of the stator is thus also via the motherboard, via which at the same time takes place the electrical Konnektierung.
Dabei können Stator und Hauptplatine in einem gemeinsamen Gehäuse angeordnet sein. Besonders vorteilhaft ist es jedoch, wenn die Hauptplatine in einem Gehäuse und der Stator in einem davon getrennten Gehäuse angeordnet sind und diese beiden Gehäuse elektrisch und mechanisch miteinander verbunden sind. Dann können Stator und Motorelektronik unabhängig voneinander gehandhabt werden, so dass bei entsprechend modularer Auslegung ein Stator mit unterschiedlichen Motorelektronikvarianten eingesetzt werden kann, ohne diesen baulich verändern zu müssen. Da die Hauptplatine vorzugsweise quer zur Längsachse des Spaltrohres, das diese durchsetzt und das auch den Stator durchsetzt, liegt, können alle elektrischen Verbindungen zwischen Stator und Motorelektronik durch einfache Steckverbindungen ausgestaltet werden, wobei die radiale Führung der Gehäuse durch das ohnehin vorhandene Spaltrohr gegeben ist.In this case, stator and motherboard can be arranged in a common housing. It is particularly advantageous, however, if the motherboard are arranged in a housing and the stator in a separate housing and these two housings are electrically and mechanically interconnected. Then stator and motor electronics can be handled independently of each other, so that in accordance with modular design, a stator with different engine electronics variants can be used without having to change this structurally. Since the motherboard is preferably transverse to the longitudinal axis of the can, which passes through them and which also passes through the stator, all electrical connections between the stator and the engine electronics can be configured by simple plug-in connections, wherein the radial guidance of the housing is given by the already existing split tube.
Vorteilhaft sind das die Hauptplatine aufnehmende Gehäuse und das den Stator aufnehmende Gehäuse jeweils als unabhängig vom Spaltrohr montierbare Baueinheiten ausgebildet. Eine solche Anordnung hat den besonderen Vorteil, dass die elektrischen/elektronischen Bauteile des Motors unabhängig von den flüssigkeitsführenden Bauteilen der Pumpe nicht nur angeordnet, sondern auch austauschbar. So kann bei einer solchen Anordnung der Stator und die Motorelektronik vom Spaltrohr und somit vom Pumpengehäuse entfernt werden, ohne dass Flüssigkeitsaustritt oder die Pumpe aus ihrer Einbaulage entfernt werden muss.Advantageously, the housing accommodating the motherboard and the housing accommodating the stator are each designed as units which can be mounted independently of the can. Such an arrangement has the particular advantage that the electrical / electronic components of the engine regardless of the liquid-carrying components of the Pump not only arranged but also interchangeable. Thus, with such an arrangement, the stator and the engine electronics can be removed from the can and thus from the pump housing without having to remove the liquid outlet or the pump from its installation position.
Unabhängig davon kann gemäß einer vorteilhaften Weiterbildung der Erfindung diese zum Pumpengehäuse gerichtete Wand des die Hauptplatine aufnehmenden Gehäuses wärmeleitend mit wärmeerzeugenden Bauteilen der Motorelektronik verbunden oder durch einen damit verbundenen Wärmeverteiler durchsetzt sein, wobei in diesem Bereich vorzugsweise seitliche Gehäuseöffnungen vorgesehen sind, welche zur Erzeugung einer Konvektionsströmung längs dieser Wand bzw. des Wärmeverteiler dienen.Regardless, according to an advantageous embodiment of the invention, this directed to the pump housing wall of the motherboard receiving housing thermally conductively connected to heat-generating components of the engine electronics or interspersed by an associated heat spreader, preferably lateral housing openings are provided in this area, which for generating a Konvektionsströmung serve along this wall or the heat spreader.
Um eine möglichst kompakte Bauform zu erreichen, ist es vorteilhaft, die hochbauenden elektrischen und elektronischen Bauteile in dem Bereich der Hauptplatine anzuordnen, welche den Wicklungskopf des Stators radial überragt, so dass diese Bauteile in dem den Wicklungskopf umgebenden Freiraum angeordnet sein können, der typischerweise innerhalb der Außenkontur des Pumpengehäuses liegt.In order to achieve the most compact possible design, it is advantageous to arrange the high-building electrical and electronic components in the region of the motherboard, which projects radially beyond the winding head of the stator, so that these components can be arranged in the space surrounding the winding head, which is typically within the outer contour of the pump housing is located.
Wenn eine Abfuhr der in der Motorelektronik entstehenden Abwärme über die Förderflüssigkeit der Pumpe erfolgen soll, dann ist es von Vorteil, wenn die wärmeerzeugenden Bauteile der Motorelektronik auf der der Pumpe zugewandten Seite der Hauptplatine angeordnet und vorzugsweise wärmeleitend mit einer axialen Abdeckung des Pumpengehäuses verbunden sind. Eine solche axiale Abdeckung des Pumpengehäuses, welche eine Wand des Pumpengehäuses bildet, kann beispielsweise durch einen am Spaltrohr vorgesehenen Flansch gebildet sein, der typischerweise aus gut leitendem Metallblech gebildet ist.If a discharge of the resulting in the engine electronics waste heat on the pumped liquid of the pump, it is advantageous if the heat-generating components of the engine electronics are arranged on the pump side facing the motherboard and preferably thermally conductively connected to an axial cover of the pump housing. Such an axial cover of the pump housing, which forms a wall of the pump housing, may for example be formed by a flange provided on the gap tube, which is typically formed of highly conductive metal sheet.
Wenn eine solche Ableitung der in der Motorelektronik erzeugten Abwärme über das Pumpengehäuse nicht gewünscht ist, dann kann es zweckmäßig sein, die wärmeerzeugenden Bauteile der Motorelektronik auf der der Pumpe abgewandten Seite der Hauptplatine anzuordnen und diese dann vorzugsweise wärmeleitend mit der Oberfläche des Motorgehäuses zu verbinden. Dann erfolgt die Wärmeabfuhr über die Oberfläche des Stator- bzw. Motorgehäuses.If such a derivation of the heat generated in the engine electronics waste heat on the pump housing is not desired, then it may be appropriate to arrange the heat-generating components of the engine electronics on the side facing away from the pump of the main board and then preferably thermally conductive to connect to the surface of the motor housing. Then the heat dissipation takes place via the surface of the stator or motor housing.
Da gemäß der Erfindung vorteilhaft die Hauptplatine den Stator radial überragt, können gemäß einer Weiterbildung der Erfindung in diesem Bereich auf der der Pumpe abgewandten Seite der Platine elektrische Anschlüsse für eine elektronische Anzeige, für ein Zusatzmodul, für einen Schalter und/oder für den Netzanschluss vorgesehen sein, um auf diese Weise den dort gebildeten Freiraum einerseits sinnvoll zu nutzen, andererseits diese Bauteile vergleichsweise einfach elektrisch anschließen zu können.Since, according to the invention, the main board advantageously projects radially beyond the stator, electrical connections for an electronic display, for an additional module, for a switch and / or for the mains connection can be provided in this area on the side of the board facing away from the pump be on the one hand meaningfully use the space formed there on the other hand To be able to connect these components comparatively easily electrically.
Vorteilhaft ist das Pumpengehäuse an seiner zum Motor weisenden Seite im Wesentlichen mit einer rechteckigen, vorzugsweise einer quadratischen Außenkontur ausgestaltet und das Motorgehäuse kongruent dazu ausgebildet. Es versteht sich, dass hier kein Rechteck oder Quadrat im geometrischen Sinne zu verstehen ist, dass Gehäuseecken gerundet ausgebildet sind und nur in etwa eine solche Außenkontur erlangt wird.Advantageously, the pump housing is designed on its side facing the motor substantially with a rectangular, preferably a square outer contour and the motor housing congruent thereto. It is understood that here is no rectangle or square in the geometric sense to understand that housing corners are rounded and only about such an outer contour is obtained.
Das Motorgehäuse kann sowohl Stator als auch Motorelektronik aufnehmen und dann eine vom Spaltrohr unabhängig montierbare Einheit bilden. Dabei kann gemäß einer Weiterbildung der Erfindung das Motorgehäuse ganz oder teilweise vergossen ausgebildet oder durch die Vergussmasse selbst gebildet sein. Es handelt sich dann also nicht um ein Gehäuse im eigentlichen Sinne, sondern um die den Stator und gegebenenfalls auch die Motorelektronik umgebende Vergussmasse, die das Gehäuse bildet.The motor housing can accommodate both stator and engine electronics and then form a independently mountable unit of the can. In this case, according to an embodiment of the invention, the motor housing may be formed completely or partially potted or formed by the potting compound itself. It is then not a housing in the true sense, but to the stator and possibly also the engine electronics surrounding potting compound, which forms the housing.
Wenn die Hauptplatine quer zur Längsachse des Spaltrohrs angeordnet ist, dann weist diese vorteilhaft auf ihrer zur Pumpe weisenden Seite einen Erdungskontakt auf, vorzugsweise einen Erdungsstift, der leitend mit dem Pumpengehäuse und/oder der Abdeckung des Pumpengehäuses verbunden ist. Ein solcher Erdungsstift kann leitend in eine entsprechende Ausnehmung im Pumpengehäuse eingreifen, so dass bei der Montage mit dem Fügen dieser Bauteile automatisch auch die erforderliche Erdung erfolgt. Der Erdungsstift kann eine Verdrehsicherung des Motorgehäuses bilden, gegebenenfalls können mehrere Stifte vorgesehen sein.If the main circuit board is arranged transversely to the longitudinal axis of the can, this advantageously has a grounding contact on its side facing the pump, preferably a grounding pin, which is conductively connected to the pump housing and / or the cover of the pump housing. Such a grounding pin can conductively engage in a corresponding recess in the pump housing, so that automatically takes place during assembly with the joining of these components, the required grounding. The grounding pin can form an anti-rotation lock of the motor housing, possibly several pins can be provided.
Besonders zweckmäßig ist es, wenn der eine Teil einer elektrischen Steckverbindung zur Leitungsverbindung der Motorelektronik bzw. des Motors mit dem Versorgungsnetz in dem den Stator radial überragenden Teil des Motorgehäuses vorgesehen ist und die Steckrichtung parallel zur Laufradachse verläuft. Bei dieser Anordnung wird ein bezogen auf die Außenkontur der Pumpe bestehender Freiraum für eine Steckverbindung zum Anschluss der Pumpe an das elektrische Versorgungsnetz genutzt. Die Leitungsführung parallel zur Laufradachse ist besonders günstig, da dies üblicherweise die in Einbaulage frei zugängliche Seite der Pumpe ist.It is particularly expedient if one part of an electrical plug connection for the line connection of the motor electronics or of the motor to the supply network is provided in the part of the motor housing projecting radially over the stator and the plugging direction is parallel to the running wheel axis. In this arrangement, based on the outer contour of the pump existing free space for a connector for connecting the pump to the electrical supply network is used. The routing parallel to the impeller axis is particularly favorable, since this is usually the freely accessible in installation position side of the pump.
Befestigt wird das Motorgehäuse anders als beim Stand der Technik vorteilhaft nicht am Pumpengehäuse, sondern mittels am Spaltrohr angreifender Befestigungsmittel, die das Motorgehäuse über das Spaltrohr am Pumpengehäuse zumindest in Achsrichtung des Motors festlegen. Es wird also vorteilhaft das Spaltrohr am Pumpengehäuse befestigt und dann das Motorgehäuse am Spaltrohr. Hierzu kann gemäß der Erfindung am motorseitigen Ende des Spaltrohrs eine umlaufende Nut vorgesehen sein, in welche mindestens eine Rastnase einer endseitigen Platte eingreift, wobei das Motorgehäuse mittels dieser Platte dann über das Spaltrohr am Pumpengehäuse festgelegt ist.Unlike in the prior art, the motor housing is fastened advantageously not on the pump housing, but by means of fastening means acting on the gap tube, which fix the motor housing via the gap tube on the pump housing at least in the axial direction of the motor. It is therefore advantageous the split tube attached to the pump housing and then the motor housing on the can. For this purpose, according to the invention, a circumferential groove may be provided on the motor-side end of the can, in which engages at least one locking lug an end plate, wherein the motor housing is then fixed by means of this plate on the gap tube on the pump housing.
Um jedoch nicht nur eine Festlegung in axialer Richtung, sondern auch in radialer Richtung, also eine Verdrehsicherung zu erreichen, ist gemäß der Erfindung zwischen Pumpengehäuse und Motorgehäuse eine solche vorgesehen. Aufgrund des dort naturgemäß gegebenen größeren Abstands zur Drehachse des Motors können schon mit vergleichsweise einfachen Bauteilen Verdrehsicherungen gebildet werden, welche ausreichende Momentenstabilität aufweisen. Insofern ist es besonders günstig, lediglich die axiale Festlegung des Motorgehäuses über das Spaltrohr und die Verdrehsicherung über gesonderte Fomschlussmittel zwischen Motor- und Pumpengehäuse zu erreichen.However, in order to achieve not only a determination in the axial direction, but also in the radial direction, ie an anti-rotation, according to the invention between the pump housing and the motor housing such is provided. Due to the given there naturally greater distance to the axis of rotation of the motor anti-rotation can be formed with relatively simple components, which have sufficient torque stability. In this respect, it is particularly favorable to achieve only the axial fixing of the motor housing via the split tube and the anti-rotation device via separate Fomschlussmittel between the motor and pump housing.
Die Erfindung ist nachfolgend anhand von in der Zeichnung dargestellten Ausführungsbeispielen näher erläutert. Es zeigen:
- Fig. 1
- eine perspektivische Ansicht eines Pumpenaggregats 1 von der Motorseite aus,
- Fig. 2
- einen Längsschnitt durch das Pumpenaggregat gemäß
Fig. 1 längs der Drehachse, - Fig. 3
- eine perspektivische Ansicht des Pumpenaggregats 1 von der Seite mit teilgeschnittenem Motorgehäuse und entfernter Endplatte,
- Fig. 4
- in vergrößerter Darstellung den Längsschnitt gemäß
Fig. 2 im Endbereich des Motors, - Fig. 5
- eine Explosionsdarstellung des Pumpenaggregats gemäß
Fig. 1 , - Fig. 6
- eine teilgeschnittene perspektivische Ansicht des Pumpenaggregats von Seiten der Pumpe,
- Fig. 7
- die Ansicht gemäß
Fig. 6 ohne Pumpe, - Fig. 8
- eine alternative Ausgestaltung in Darstellung nach
Fig. 6 , - Fig. 9
- eine Darstellung dieser alternativen Ausführung ähnlich
Fig. 7 , - Fig. 10
- eine perspektivische Darstellung eines in einem Gehäuse eingegliederten Stators,
- Fig. 11
- eine perspektivische Darstellung des Stators ohne Gehäuse,
- Fig. 12
- in Explosionsdarstellung den Aufbau den Elektronikgehäuses,
- Fig. 13
- die Explosionsdarstellung gemäß
Fig. 12 aus anderem Blickwinkel, - Fig. 14
- eine perspektivische Ansicht auf eine Hauptplatine mit darauf angebrachtem Stator und
- Fig. 15
- eine perspektivische Ansicht auf das mit Hauptplatine und Stator bestückte Motorgehäuse.
- Fig. 1
- a perspective view of a
pump unit 1 from the motor side, - Fig. 2
- a longitudinal section through the pump unit according to
Fig. 1 along the axis of rotation, - Fig. 3
- a perspective view of the
pump unit 1 from the side with partially cut motor housing and remote end plate, - Fig. 4
- in an enlarged view the longitudinal section according to
Fig. 2 in the end of the engine, - Fig. 5
- an exploded view of the pump unit according to
Fig. 1 . - Fig. 6
- a partially cutaway perspective view of the pump unit from the pump side,
- Fig. 7
- the view according to
Fig. 6 without pump, - Fig. 8
- an alternative embodiment in illustration according to
Fig. 6 . - Fig. 9
- a representation of this alternative embodiment similar
Fig. 7 . - Fig. 10
- a perspective view of a incorporated in a housing stator,
- Fig. 11
- a perspective view of the stator without housing,
- Fig. 12
- in an exploded view, the structure of the electronics housing,
- Fig. 13
- the exploded view according to
Fig. 12 from a different angle, - Fig. 14
- a perspective view of a motherboard with attached stator and
- Fig. 15
- a perspective view of the equipped with motherboard and stator motor housing.
Das anhand der Figuren dargestellte Pumpenaggregat 1 weist ein Pumpengehäuse 2 auf, welches als Inline-Gehäuse ausgebildet ist und einen Eingangsanschluss 3 und einen achsgleich dazu angeordneten Ausgangsanschluss 4 aufweist. Vom Eingangsanschluss 3 verläuft ein Kanal zum Saugmund eines Kreiselrades 5 der Pumpe, das über eine innerhalb des Pumpengehäuses 2 ausgebildete Schnecke zum Ausgangsanschluss 4 fördert.The
Angetrieben wird die Pumpe durch einen Elektromotor, der durch einen Stator 6 und einen Rotor 7 gebildet ist. Stator 6 und Rotor 7 sind durch ein Spaltrohr 8 getrennt. Der Rotor 7 ist Teil einer Welle 9, auf deren pumpenseitigen Ende das Kreiselrad 5 drehfest befestigt ist. Das Spaltrohr 8 ist als endseitig geschlossener Spaltrohrtopf ausgebildet und weist darauf einen abnehmbaren Verschlussstopfen 10 auf, über welchen das Spaltrohr 8 entlüftet werden kann und die Welle 9 zugänglich ist. Das Spaltrohr 8 weist pumpenseitig einen flanschartigen Ansatz 11 auf, mit dem es direkt am Pumpengehäuse 2 befestigt ist.The pump is driven by an electric motor, which is formed by a
Der Stator 6 ist in einem Statorgehäuse 12 angeordnet, welches sich an ein Elektronikgehäuse 13 anschließt, das zwischen Statorgehäuse 12 und Pumpengehäuse 2 angeordnet ist. Statorgehäuse 12 und Elektronikgehäuse 13 bilden das Motorgehäuse 14, das einstückig, wie in
Das Pumpengehäuse 2 hat in Achsrichtung des Rotors 7 gesehen eine im Wesentlichen quadratische Form mit abgerundeten Ecken. Das in Richtung zum Motor daran fluchtend anschließende Elektronikgehäuse 13 setzt diese Form fort, hat also ebenfalls einen im Wesentlichen quadratischen Querschnitt mit abgerundeten Ecken. Das daran in Achsrichtung des Rotors anschließende Statorgehäuse 12 ist nur im Bereich der Ecken stetig in die Außenkontur des Elektronikgehäuses 13 übergeführt, weist jedoch ansonsten einen deutlich kleineren Querschnitt auf, so dass sich eine Abstufung 15 zum Elektronikgehäuse 13 hin ergibt. Das Elektronikgehäuse 13 überragt also in diesem Bereich radial das Statorgehäuse 12.The
Im Bereich dieser Abstufung 15 ist eine elektronische Anzeige 16 nahe der Oberseite des Motorgehäuses 14 bezogen auf die normale Einbaulage gemäß
Die Bauteile 16, 17, und 18 sind über entsprechende elektrische Steckverbindungen unmittelbar mit einer innerhalb des Elektronikgehäuses 13 angeordneten Hauptplatine 20 verbunden, welche, das Spaltrohr 8 umgebend, senkrecht zur Rotorachse 21 angeordnet ist. Da diese Bauteile 16, 17, 18 in Achsrichtung 21 gesehen seitlich vom Stator 6 liegen, können diese neben dem Stator 6 auf der Hauptplatine 20 kontaktiert werden, die die gesamte Motorelektronik sowie den Netzanschluss trägt.The
Wie in
Ungeachtet dessen, ob Statorgehäuse 12 und Elektronikgehäuse 13 einstückig, wie in
In der anhand der
Die Steckverbindung 28 besteht aus einem statorseitigen, in Richtung zur Pumpe vorspringenden Steckerteil sowie einem entsprechenden Anschlussteil auf der Hauptplatine 20. Das Anschlussteil kann beispielsweise durch Kontaktstifte gebildet sein, die vom Steckerteil muffenartig umgriffen werden. In vergleichbarer Weise sind die Bauteile 16, 17 und 18 direkt mit der Hauptplatine 20 elektrischleitend verbunden.The
Das Elektronikgehäuse 13 weist auf der zur Pumpe weisenden Seite eine Wandung 31 auf, die in Einbaulage mit Abstand zu dem flanschartigen Ansatz 11, welcher eine Wandung des Pumpengehäuses bildet, angeordnet ist. Der dazwischen gebildete Freiraum ist über Ausnehmungen 32 in der Außenseite des Elektronikgehäuses 13, und zwar an der Außenseite des Gehäuses zur Außenumgebung hin geöffnet. Weiterhin sind in der Wandung 31 Ausnehmungen 33 vorgesehen, welche einen Zugang zu dem sonst geschlossenen Elektronikgehäuse 13 bilden. Über die Ausnehmungen 33, 32 kann ein Gasaustausch zwischen der Außenumgebung und dem Inneren des Elektronikgehäuses 13 erfolgen, darüber hinaus kann hierüber Schwitzwasser aus dem Elektronikgehäuse sowie dem jenseits der Wandung 31 gebildeten Raum zwischen Elektronikgehäuse und Pumpengehäuse 2 ins Freie entweichen.The
Durchsetzt wird die Wandung 31 durch einen Erdungsstift 34, welcher elektrisch leitend auf der zur Pumpe weisenden Seite der Hauptplatine 2 angeordnet ist und nach Montage des Elektronikgehäuses 13 am Pumpengehäuse 2 eine elektrische Erdungsverbindung zum Pumpengehäuse 2 bildet. Hierfür ist in der zum Elektronikgehäuse 13 weisenden Stirnseite des Pumpengehäuses 2 eine entsprechende Ausnehmung vorgesehen, in welche der Erdungsstift 34 leitend eingreift. Das Pumpengehäuse 2 besteht aus elektrisch leitendem Werkstoff. Der Erdungsstift kann darüber hinaus auch eine Verdrehsicherung für das Elektronikgehäuse 13 bezogen auf das Pumpengehäuse 2 bilden. Darüber hinaus ist eine solche Drehsicherung jedoch durch vier Zapfen 26 vorgesehen, welche in die Ausnehmungen 33 eingreifen. Es versteht sich, dass, wenn die Ausnehmungen 33 auch zur Be-/Entgasung bzw. zur Abfuhr des Kondenswassers vorgesehen sein sollen, die Anzahl der Ausnehmungen 33 größer als die Anzahl der darin eingreifenden Zapfen 26 sein muss. Alternativ können hierzu auch in der Wandung 31 vorgesehene Ausnehmungen 35 dienen, welche zur Aufnahme der Schraubenköpfe vorgesehen sind, mit welchen der flanschartige Teil 11 des Spaltrohrs 8 am Pumpengehäuse 2 festgeschraubt ist. Diese Ausnehmungen 35 können geschlossen als Sacklöcher oder offen ausgebildet sein, je nachdem, ob eine Verbindung mit dem Inneren des Elektronikgehäuses 13 erfolgen soll oder nicht.The
Der zwischen Elektronikgehäuse 13 und Pumpengehäuse 2 gebildete Raum kann über die Ausnehmungen 32 von der Umgebungsluft durchströmt werden und somit zu Kühlzwecken genutzt werden. Hierzu ist bei der anhand der
Bei der anhand der
Wenn, wie weiter oben beschrieben, die Kühlung der innerhalb des Elektronikgehäuses 13 angeordneten wärmeerzeugenden Elektronik über die Förderflüssigkeit der Pumpe erfolgen soll, dann ist es zweckmäßig, den Wärmeverteiler im Boden des Elektronikgehäuses 13 so auszubilden, dass dieser bis an die Wandung 11 des Pumpengehäuses heranragt und an dieser wärmeleitend anliegt. Eine solche Ausbildung ist in den
Wenn das Motorgehäuse 14 zweiteilig ausgebildet ist, wie es anhand der
Bei der anhand der
Es sei darauf hingewiesen, dass die Zapfen 26 nicht nur als Verdrechsicherung, sondern auch zur Führung zwischen den Bauteilen sowie zur Erhöhung der Stabilität des Gesamtaggregates dienen.It should be noted that the
- 11
- Pumpenaggregatpump unit
- 22
- Pumpengehäusepump housing
- 33
- Eingangsanschlussinput port
- 44
- Ausgangsanschlussoutput port
- 55
- Kreiselradimpeller
- 66
- Statorstator
- 77
- Rotorrotor
- 88th
- Spaltrohrcanned
- 99
- Wellewave
- 1010
- Verschlussstopfensealing plug
- 1111
- flanschartiger Ansatz am Spaltrohrflange-like approach to the can
- 1212
- Statorgehäusestator
- 1313
- Elektronikgehäuseelectronics housing
- 1414
- Motorgehäusemotor housing
- 1515
- Abstufunggradation
- 1616
- Anzeigedisplay
- 1717
- Drehschalterrotary switch
- 1818
- Steckerplug
- 1919
- Netzkabelpower cable
- 2020
- Hauptplatinemotherboard
- 2121
- Rotorachserotor axis
- 2222
- elektronisches Bauteilelectronic component
- 2323
- Nutgroove
- 2424
- Endplatteendplate
- 2525
- unterbrochener Ringbroken ring
- 2626
- Zapfenspigot
- 2727
- ringförmiger Teilannular part
- 2828
- Steckverbindungconnector
- 2929
- Rastzungenlocking tongues
- 3030
- Rastnaselocking lug
- 3131
- Wandungwall
- 3232
- Ausnehmungenrecesses
- 3333
- Ausnehmungenrecesses
- 3434
- Erdungsstiftground pin
- 3535
- Ausnehmungenrecesses
- 3636
- RippenkühlkörperCooling fins
- 3737
- Ausnehmungrecess
- 3838
- ringförmiges Gehäuseteilannular housing part
- 3939
- Wärmeverteilerheat spreader
Claims (20)
- A wet-running centrifugal pump with a pump casing (2) which leads fluid, with a canned motor which drives the pump, said motor having a stator (6) and a rotor (7) which runs in the fluid-leading can (8) and which has a shaft (9), on which the impeller (5) of the pump is seated, and with motor electronics, wherein the motor electronics or at least part of the motor electronics are/is arranged in a housing (13) between the stator (6) and the pump casing (2) in a manner surrounding the can (8), said housing comprising a wall (31) which is directed to the pump casing (2), characterised in that the wall (31) of the housing (13) which is directed to the pump casing (2) comprises an opening (33) and is distanced to the pump casing (2), and that the space which is formed between this wall (31) and the pump casing (2) comprises at least one opening (32) to the outer environment.
- A wet-running centrifugal pump according to claim 1, characterised in that the motor electronics in the region which surrounds the can (8) is arranged and designed in a manner such that it has a radial extension which projects beyond the stator (6) and which preferably however lies within the outer contour of the pump casing (2).
- A wet-running centrifugal pump according to one of the preceding claims, characterised in that a main circuit board (20) which transversely to the impeller axis (21) is arranged between the stator (6) and the pump in a manner surrounding the can (8) and via which the stator windings are connected and which comprises a connection for connecting to the supply mains (19) is provided.
- A wet-running centrifugal pump according to one of the preceding claims, characterised in that the main circuit board (20) is mechanically connected to the stator (6), preferably into a construction unit.
- A wet-running centrifugal pump according to one of the preceding claims, characterised in that the main circuit board (20) is arranged in a housing (13) and the stator (6) is arranged in a housing (12) which is separated therefrom, and these are electrically and mechanically connected to one another.
- A wet-running centrifugal pump according to one of the preceding claims, characterised in that the housing (13) which receives the main circuit board (20), and the housing (12) which receives the stator (6) each form a construction unit which can be assembled independently of the can (8).
- A wet-running centrifugal pump according to one of the preceding claims, characterised in that a thermal barrier is arranged in the space between the pump casing (2) and the housing (13) which receives the main circuit board (20).
- A wet-running centrifugal pump according to one of the preceding claims, characterised in that the wall (31) of the housing (13) accommodating the main circuit board (20), said wall being directed to the pump casing (2), is connected to the heat-producing components of the motor electronics in a heat-conducting manner, or a heat distributor which is connected to these passes through this wall, and that lateral housing openings (32) for producing a convection flow along this wall (31) or the heat distributor are provided.
- A wet-running centrifugal pump according to one of the preceding claims, characterised in that the tall electrical and electronic components (22) are arranged in the region of the main circuit board (20) which projects radially at least beyond the end windings of the stator (6).
- A wet-running centrifugal pump according to one of the preceding claims, characterised in that heat-producing components of the motor electronics are arranged on the side of the main circuit board (20) which faces the pump and are connected to an axial covering (11) of the pump casing (2) preferably in a heat-conducting manner.
- A wet-running centrifugal pump according to one of the preceding claims, characterised in that heat-producing components of the motor electronics are arranged on the side of the main circuit board (20) which is distant to the pump and are connected to the surface of the motor housing (14) preferably in a heat-conducting manner.
- A wet-running centrifugal pump according to one of the preceding claims, characterised in that the main circuit board, in the region, in which it projects radially beyond the stator (6) and on the side which is away from the pump comprises electrical connections for an electronic display (16), for an additional module, for a switch (17) and/or for the mains connection (18).
- A wet-running centrifugal pump according to one of the preceding claims, characterised in that the pump casing (2) on its side facing the motor has an essentially rectangular, preferably square outer contour, and that the motor housing (16) is formed congruently to this.
- A wet-running centrifugal pump according to one of the preceding claims, characterised in that the motor housing (14) accommodates the stator (6) and the motor electronics, and forms a unit which can be assembled independently of the can (8).
- A wet-running centrifugal pump according to one of the preceding claims, characterised in that the motor housing (14) is designed in a completely or partially moulded manner or is formed by the moulded mass.
- A wet-running centrifugal pump according to one of the preceding claims, characterised in that the main circuit board (20) on the side which faces the pump comprises an earthing contact, preferably an earthing pin (34), which is connected to the pump casing (2) and/or to the covering (11) of the pump casing (2) in a conductive manner
- A wet-running centrifugal pump according to one of the preceding claims, characterised in that the one part of an electrical plug-in connection for the lead connection to the supply mains is provided in the part of the motor housing (14) which projects radially beyond the stator (6), wherein the plug-in direction is arranged parallel to the impeller axis (21).
- A wet-running centrifugal pump according to one of the preceding claims, characterised in that fastening means (24, 25, 30) which engage on the can (8) are provided, said fastening means fixing the motor housing (14) on the pump casing (2) at least in the axial direction of the rotor (7).
- A wet-running centrifugal pump according to one of the preceding claims, characterised in that a peripheral groove (23) is provided close to the motor-side end of the can (8), into which groove at least one locking lug (30) of a terminal plate (24) engages, wherein the motor housing (14) is fixed on the pump casing (2) by way of this plate (24).
- A wet-running centrifugal pump according to one of the preceding claims, characterised in that a rotation lock (26) is provided between the pump casing (2) and the motor housing (14), preferably by way of positive-fit means between the motor housing and the pump casing.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP07024385.2A EP2072828B1 (en) | 2007-12-17 | 2007-12-17 | Wet-running centrifugal pump |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP07024385.2A EP2072828B1 (en) | 2007-12-17 | 2007-12-17 | Wet-running centrifugal pump |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2072828A1 EP2072828A1 (en) | 2009-06-24 |
EP2072828B1 true EP2072828B1 (en) | 2018-03-28 |
Family
ID=39402926
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07024385.2A Active EP2072828B1 (en) | 2007-12-17 | 2007-12-17 | Wet-running centrifugal pump |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP2072828B1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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EP3536963B1 (en) * | 2018-03-09 | 2022-03-30 | DAB Pumps S.p.A. | Centrifugal electric pump assembly |
US11293444B2 (en) | 2018-06-14 | 2022-04-05 | Regal Beloit America, Inc. | Pump assembly having an axial flux electric motor |
Families Citing this family (20)
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EP2500576B1 (en) * | 2011-03-12 | 2016-06-29 | Grundfos Management a/s | Heat circulation pump |
PL2500575T5 (en) | 2011-03-12 | 2022-10-17 | Grundfos Management A/S | Heat circulation pump |
PL2500574T3 (en) * | 2011-03-12 | 2017-02-28 | Grundfos Management A/S | Heat circulation pump |
PL2626645T3 (en) * | 2012-02-08 | 2017-03-31 | Grundfos Holding A/S | Pump assembly with an electric connector plug |
PL2626980T3 (en) * | 2012-02-08 | 2015-04-30 | Grundfos Holding As | Pump power unit |
US9360015B2 (en) * | 2012-07-16 | 2016-06-07 | Magna Powertrain Of America, Inc. | Submerged rotor electric water pump with structural wetsleeve |
DE102015203090A1 (en) * | 2015-02-20 | 2016-08-25 | Schaeffler Technologies AG & Co. KG | Drive arrangement for driving an actuator element |
FR3060670B1 (en) * | 2016-12-15 | 2021-03-19 | Wilo Intec | CONDENSATION LIMITATION CAVITY CIRCULATION PUMP |
DE202017101204U1 (en) * | 2017-03-02 | 2017-03-21 | Grundfos Holding A/S | heat circulating pump |
EP3382206B1 (en) | 2017-03-31 | 2020-12-16 | Grundfos Holding A/S | Pump assembly |
PL3382207T3 (en) * | 2017-03-31 | 2022-01-24 | Grundfos Holding A/S | Pump assembly |
CN108678965B (en) * | 2018-06-20 | 2024-06-04 | 广州奥姆特机电设备制造有限公司 | Fully radiating shielding variable frequency circulating pump |
EP3667092B1 (en) | 2018-12-13 | 2021-08-18 | Grundfos Holding A/S | Pump assembly |
EP3667089A1 (en) | 2018-12-13 | 2020-06-17 | Grundfos Holding A/S | Pump assembly |
EP3667088A1 (en) | 2018-12-13 | 2020-06-17 | Grundfos Holding A/S | Pump assembly |
EP3667090B1 (en) | 2018-12-13 | 2021-07-07 | Grundfos Holding A/S | Pump assembly |
EP3667087B1 (en) | 2018-12-13 | 2022-12-07 | Grundfos Holding A/S | Pump assembly |
EP3667091B1 (en) | 2018-12-13 | 2021-08-18 | Grundfos Holding A/S | Pump assembly |
EP3667099A1 (en) | 2018-12-13 | 2020-06-17 | Grundfos Holding A/S | Pump assembly |
DE102019124231A1 (en) * | 2019-09-10 | 2021-03-11 | Schaeffler Technologies AG & Co. KG | Electric drive device and drive arrangement |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10246349A1 (en) * | 2002-10-04 | 2004-04-29 | Siemens Ag | Cooling device for a motor vehicle with a cooling channel for a cooling medium |
GB2418072B (en) * | 2004-09-14 | 2008-05-07 | Dana Automotive Ltd | Pump assembly |
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2007
- 2007-12-17 EP EP07024385.2A patent/EP2072828B1/en active Active
Non-Patent Citations (1)
Title |
---|
None * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3536963B1 (en) * | 2018-03-09 | 2022-03-30 | DAB Pumps S.p.A. | Centrifugal electric pump assembly |
US11293444B2 (en) | 2018-06-14 | 2022-04-05 | Regal Beloit America, Inc. | Pump assembly having an axial flux electric motor |
Also Published As
Publication number | Publication date |
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EP2072828A1 (en) | 2009-06-24 |
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